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pack.c: add more checks for pack_pack().

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This commit is contained in:
Yukihiro "Matz" Matsumoto
2021-02-27 12:00:24 +09:00
parent 30b1287df5
commit 3da372b30f
1 changed files with 7 additions and 2 deletions
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mrbgems/mruby-pack/src/pack.c
+7 -2
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@@ -1186,10 +1186,14 @@ mrb_pack_pack(mrb_state *mrb, mrb_value ary)
if (dir == PACK_DIR_INVALID)
continue;
else if (dir == PACK_DIR_NUL) {
ridx += pack_x(mrb, mrb_nil_value(), result, ridx, count, flags);
continue;
ridx += pack_x(mrb, mrb_nil_value(), result, ridx, count, flags);
if (ridx < 0) goto overflow;
continue;
}
if ((flags & PACK_FLAG_WIDTH) && aidx >= RARRAY_LEN(ary)) {
mrb_raise(mrb, E_ARGUMENT_ERROR, "too few arguments");
}
for (; aidx < RARRAY_LEN(ary); aidx++) {
if (count == 0 && !(flags & PACK_FLAG_WIDTH))
break;
@@ -1258,6 +1262,7 @@ mrb_pack_pack(mrb_state *mrb, mrb_value ary)
}
}
if (ridx < 0) {
overflow:
mrb_raise(mrb, E_RANGE_ERROR, "negative (or overflowed) template size");
}
}